VO2 Nanoflakes as the Cathode Material of Hybrid Magnesium-Lithium-Ion Batteries with High Energy Density

Cunyuan Pei; Fangyu Xiong; Jinzhi Sheng; Yameng Yin; Shuangshuang Tan; Dandan Wang; Chunhua Han; Qinyou An; Liqiang Mai

doi:10.1021/acsami.7b02480

VO₂ Nanoflakes as the Cathode Material of Hybrid Magnesium-Lithium-Ion Batteries with High Energy Density

ACS Appl Mater Interfaces. 2017 May 24;9(20):17060-17066. doi: 10.1021/acsami.7b02480. Epub 2017 May 15.

Authors

Cunyuan Pei¹, Fangyu Xiong¹, Jinzhi Sheng¹, Yameng Yin¹, Shuangshuang Tan¹, Dandan Wang², Chunhua Han¹, Qinyou An¹, Liqiang Mai^{1

3}

Affiliations

¹ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Hubei, Wuhan 430070, China.
² Department of Materials Science and Engineering, University of Michigan , Ann Arbor, Michigan 48109, United States.
³ Department of Chemistry, University of California , Berkeley, California 94720, United States.

PMID: 28467043
DOI: 10.1021/acsami.7b02480

Abstract

The hybrid magnesium-lithium-ion batteries (MLIBs) combining the dendrite-free deposition of the Mg anode and the fast Li intercalation cathode are better alternatives to Li-ion batteries (LIBs) in large-scale power storage systems. In this article, we reported hybrid MLIBs assembled with the VO₂ cathode, dendrite-free Mg anode, and the Mg-Li dual-salt electrolyte. Satisfactorily, the VO₂ cathode delivered a stable plateau at about 1.75 V, and a high specific discharge capacity of 244.4 mA h g^-1. To the best of our knowledge, the VO₂ cathode displays the highest energy density of 427 Wh kg^-1 among reported MLIBs in coin-type batteries. In addition, an excellent rate performance and a wide operating temperature window from 0 to 55 °C have been obtained. The combination of VO₂ cathode, dual-salt electrolyte, and Mg anode would pave the way for the development of high energy density, safe, and low-cost batteries.

Keywords: APC−LiCl electrolyte; VO2; dendrite-free; high energy density; hybrid Mg−Li battery; nanoflakes.